Mack Mb Recalls

12 Transport Canada safety recalls for the Mack Mb, model years 1967–1982. Tap any recall for the hazard, affected models, and corrective action.

Mack Mb — Not Entered High risk

Apr 5, 1984 Model years: 1978, 1979, 1980, 1981, 1982

THE SPRING SEAT, WHICH IS LOCATED BETWEEN THE AXLE HOUSING AND THE REAR SUSPENSION SPRING PACK CAN DEFORM, RESULTING IN REDUCED CLAMPING FORCE IN THE SUSPENSION ASSEMBLY. THIS COUL

Also affects: Mack Cf, Mack F, Mack Fm, Mack Mc, Mack Mr

Mack Mb — Not Entered High risk

Jul 12, 1979 Model years: 1978, 1979

VEHICLES EQUIPPED WITH MACK RA23 OR RA24 REAR AXLES MAY CONTAIN REAR SUSPENSION SPRING SEATS THAT COULD DEFORM ON SPRING DEFLECTION RESURING GEAR OUTPUT SHAFT SPLINES AND ULTIMATEL

Also affects: Mack Rs, Mack Rm, Mack F, Mack R, Mack Rl

Mack Mb — Not Entered High risk

May 4, 1979 Model years: 1974, 1975, 1976, 1977, 1978, 1979

ANTI-WHEEL LOCK VALVES SUPPLIED BY EATON CORPORATION MAY BE EXPOSED TO ACCUMULATED CONCENTRATIONS OF FLUID CONTAMINANTS IN THE AIR BRAKE SYSTEM THAT COULD CAUSE THE PISTON TO STICK

Also affects: Mack Dm, Mack Dmm, Mack F, Mack Hmm, Mack R

Mack Mb — Not Entered High risk

Jan 16, 1979 Model years: 1978

TRUCKS EQUIPPED WITH MACK SH34 OR SH38 BOGIE SUSPENSIONS. THE BEAM HANGER BRACKETS MADE BY SUPERIOR STEEL CASTINGS HAVE LOW MECHANICAL PROPERTIES AND EXCESSIVE SHRINKAGE. FAILURE O

Also affects: Mack Dmm, Mack F, Mack R, Mack Rd

Mack Mb — Not Entered High risk

Nov 3, 1978 Model years: 1977, 1978

TRUCKS EQUIPPED WITH BENDIX ANTI-WHEEL LOCK ELECTRONIC CONTROLLERS. A DIODE FAILURE WHTHIN THE ELECTRONIC CONTROLLER MAY BLOCK AIR PRESSURE TO THE BRAKE CHAMBERS RESULTING IN A NO-

Also affects: Mack Dm, Mack Dmm, Mack F, Mack R, Mack Rd

Mack Mb — Not Entered High risk

Oct 5, 1978 Model years: 1977, 1978

TRUCKS EQUIPPED WITH BOGIE (TANDEM REAR) AXLES THAT ARE EQUIPPED TRUCKS EQUIPPED WITH BOGIE (TANDEM REAR) AXLES THAT ARE EQUIPPED WITH A SINGLE ANTI-WHEEL LOCK CONTROLLER. WHEEL SE

Also affects: Mack Dm, Mack Dmm, Mack F, Mack Mc, Mack Mr

Mack Mb — Not Entered High risk

Aug 21, 1978 Model years: 1971, 1972, 1973, 1974

VEHICLES E3QUIPPED WITH MACK FA534 SERIES FRONT STEERING AXLES AND INTEGRAL HYDRAULIC POWER STEERING. THE STEERING KNUCKLES MAY HAVE A REDUCED FATIGUE LIFE AS A RESULT OF IMPROPER

Also affects: Mack F, Mack R, Mack U

Mack Mb — Not Entered High risk

Aug 21, 1978 Model years: 1974, 1975, 1976, 1977, 1978

TRUCKS EQUIPPED WITH MACK FA AND FAW 6A6 AND 617 SERIES FRONT STEERING AXLES. THE CROSS STEERING ARMS MAY HAVE INSUFFICIENT FATIGUE LIFE IN THE NECK AREA NEAR THE BOSS FOR THE CROS

Also affects: Mack Cf, Mack Dm, Mack Dmm, Mack Rd

Mack Mb — Not Entered High risk

Dec 2, 1977 Model years: 1977

VEHICLES EQUIPPED WITH SWTL56, SW56 OR SW57 SERIES BOGIES (TANDEM AXLES). THE WELDS SECURING THE REAR AXLE SPRING INSULATOR BRACKET TO THE AXLE HOUSING ARE IMPROPERLY POSITIONED AN

Also affects: Mack Rs, Mack Wl, Mack Ws, Mack Rl, Mack R

Mack Mb — Not Entered High risk

Jul 11, 1977 Model years: 1977

TRUCKS EQUIPPED WITH DAYTON-WALTHER FRONT WHEELS AND MACK FA617C OR FAW617 FRONT AXLES. THE DAYTON-WALTHER FRONT WHEEL STUDS WERE NOT PROPERLY HEAT TREATED AND ARE SUBJECT TO CRACK

Also affects: Mack Cf, Mack Dm, Mack F, Mack R, Mack Rd

Mack Mb — Not Entered High risk

Dec 1, 1975 Model years: 1974, 1975

THE PRIMARY AND SECONDARY AIR SUPPLY LINES MAY HAVE BEEN CONNECTED IN REVERSE AT THE DUAL BRAKE TREADLE VALVE.

Also affects: Mack Dm, Mack Dmm, Mack F, Mack R, Mack Rd

Mack Mb — Not Entered High risk

Jun 30, 1975 Model years: 1967, 1968, 1969, 1970, 1971, 1972, 1973

VEHICLES EQUIPPED WITH SW56, 78, 82 AND 86 SERIES REAR AXLES. THE REAR AXLE TRUNNION BRACKET MAY DEVELOP CRACKS. IF THE CRACKS ARE NOT DETECTED, CONTINUED OPERATION COULD ULTIMATEL

Also affects: Mack Dm, Mack F, Mack R, Mack U

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